Corner joint for screen and other frames



Feb, 13, 1923. 1,445,425 R. $.VAN FLEET CORNER JOINT FOR SCREEN AND 'OTHER FRAMES Filed Jill 20, 1921 WITNESSES ATTORN EY Patented Feh. 13, 1923..

RODNEY S. VAN FLEET, OF FINDLAY, OHIO.

CORNER JOINT FOR SCREEN AND OTHER FRAMES.

Application filed July 20, 1921.

To all whom it may concern:

Beit known that I, RODNEY S. VAN FLEET, a citizen of the United States, residing at Findlay, in the county of Hancock and,

State of Ohio, have invented a new and use ful Improvement in Corner Joints for Screen and Other Frames, of which the fol lowing is a specification.

This invention has reference to corner joints for screen and other frames, and follows in general the lines of the corner joint construction shown and described in Letters Patent No. 1,161,169 for a corner joint for screen and other frames, patented November 23, 1915, to F. W. Van Fleet and myself.

The object of the inventionis to produce a simple, practical and inexpensive corner joint, designed particularly for screen frames similar in appearanceto a mortise and tenon or miter joint, but providing for adjustability to adapt the frame to windows of different sizes, and wherein the screen material may be firmly and smoothly attached, with the whole structure free from liability of loosening or pulling apart.

In accordance with the invention, the joint is formed by the junction at each corner of the frame of two bars, with one carrying a plate with a hook projection beyond which the plate extends, while the other bar is provided with a rabbet and a kerf adapted to receive the hook and plate extension, whereby the two bars at the joint may slide together lengthwise of one bar to provide for the adjustment-of the size of the frame and for the reception of brads or other fastening devices to ultimately unite the two bars against possibility of displace.

ment, so that the frame when completed will provide a particularly rigid structure to receive and hold the screen material in a taut condition, whereby thefinished screen, besides fitting the window opening, will present and maintain a neat appearance without sagging or buckling of the screen material.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing in the drawing, but may be changed and modified so long as such changes and modifications mark no material departure from Serial No. 486,241.

the salient features of the invention as ex pressed in the appended claims.

In the drawings:

Fig.1 is a perspective view of one corner of a window screen with the parts assembled and carrying the screen material.

Fig. 2 is a perspective View, with parts in section, of one of the bars of the frame.

F 1g. 3 is a perspective view of one end of another bar of the frame meeting the first named bar.

Fig. 4 is a section lengthwise of the joint showing the meeting ends of two bars secured together- Fig. 5 1s a section on the line 5-5 of Fig. 6 is a perspective view of one of the corner anchor plates.

Referring to the drawings, there are shown two bars or frame members 1, 2 respectively, the drawing showing the corner meeting ends of the two bars, which when properly joined constitute a corner joint. Along one long edge of each bar or rail, there is produced a rabbet groove 3, of appropriate width and depth to receive a strip a of molding and screen material 5, which may be of the usual woven wire screening. At the inner edge of each rabbet 3 there is also produced a longitudinal groove 6, The bar 1 has a kerf 7 and the bar 2 has a kerf 8'entering the bar flush with the face of the groove 6.

Fast to the bar 2 is a plate or hook 9 provided with an extension 10 at one end and a similar extension 11 at the other end and bent intermediately between the extensions into a channel 12 forming a. bill or hook with the two extensions 10 and 11 in alinement. The extension 11 enters the kerf 7 in the bar 1 and the extension 10 enters the kerf 8 inthe bar2. The plate or hook 9 is made fast to the rail 2 by nails or brads 13 driven through the rail 2 thereby piercing remote from the rabbet 3 in which the molding is seated, with a bevel 15, in which a tongue 16 along the corresponding edge of the bar 2 seats. Between the bevel 15 and the rabhet 3 on the other side of the bar 1, there is formed a tongue 17 adapted to seat in a groove 18 produced across the end of the rail 2 by the tongue 16 and another tongue 19 on the opposite side of the rail 2. The groove 6 which is formed in and extends along one face of the tongue 17 coincident with the rabbet 3 in the bar 1 has the hook 12 of the plate 9 seated therein with theex tension 10 in the kerf 8 and, when the parts are assembled, with the extension 11 in the kerf 7 of the bar 1. The hook or bill 12, on account ofits channel form, provides a stif member resistant to side movements and when the plate 9 is lodgedbetween the two rail members at the joint, the rigidity of the hook'member or plate is sufficiently pronounced to permit the employment of of frames of several different standard sizes By making each bar with one end capable of receiving'the opposite end of the other bar, the bars may be interlocked in the reverse manner at the oppos'te ends, whereby one bar may have the bar meeting it at the corner or joint driven thereon in the direction of the length of the channel 12 and then the second bar at the other end may have a bar driven thereon at the joints in the direction of the length of the second bar, so that the frame as a whole, may be made smaller or larger as the case may be, by having the bars driven together in progressive order about the frame. The length of the kerfs 7 and 8 agree with the amount of adjustment provided, whereby the frames may, all be of the same size as manufactured and sold andmay then be assembled and projecting ends of the bars cut off before the screen'netting 5 is applied and the molding 4 is nailed on to complete the frame.

The hook or bill 12 in the metal corner plate entering the groove 6 serves to draw the two parts of the joint firmly together and any loosening of the joint may be avoided by driving acorrugated anchor nail 20 or fastener across the meeting edges of the ra ls at the joint.

The use of the metal plate 9 with extensions thereof on opposite sides of the channel 12 contributes materially to the production of an exceptionally strong joint by the use of very thin metal and very little strength of the wood is sacrificed, because of the extremely small amount of wood which must be cut away. The plate 9 which extends on either side of the channel 12 adapted to enter both bars or rails for a considerable distance beyond where the channel is embedded in the bars, so that the extensions of the plate have a particularly strong hold in the kerfs provided for them.

The slot or groove in the rails or bars to receive the metal channel or hook part coacts to interlock both the wooden and metal portions to make a knock-down draw-joint frame handy, strong, easily adjusted to the fraction of an inch, neat and regular in appearance, as well as economical to manufacture and answering all the requirements of the trade.

The metal plate or hook structure is so embedded in the two rails or bars that there is no chance of pulling the channel or hook open under strains towhich it may be sub,- jected and the joint is always tight and is stronger than joints for the same purpose, as heretofore proposed. The joint may be manufactured at less cost than other similar joints, because of less weight of metal and t e fac t t the relatively th n sh e metal may be easily out and stamped and may be permanently anchored in one of the bars by brads which may be driven into the wood through the metal, thus avoiding drilling holes, so that in the items of both hard ware and labor, there is a marked saving effected.

The appearance of the joint is improved, because of the absence of screws or large metal nails or pins on the surface of the frame, and the hiding of the metal plate, which is wholly embedded in the frame, and the ample space provided for the fastening of the screen cloth, or netting.

The invention also has the advantage of ready assemblage being niore fqnickly put together than occurs with other forins of corner joints. i

What is claimed 1. A corner joint for window screen and other frames, comprising two bars meeting at right ang es, one ar carrying a metal plate with transverse hook or channel beyond opposite sides of which the plate ex.-

tends, one of the bars having a rabbet tending lengthwise thereof, and a groove substantially flush with the rabbet, both bars having kerf th re n re iv g the xt nsions of the plate with the channel portion of the plate located in the groove to move therealong, the joint being completed by means of small nails, and the joii t plate be ing hidden from view and traversed by the nails. e i i i I .2. A. corner joint for window screen and other frames, comprising two abutting bars, in angular relation, one bar having a inortise groove across .One end with tongues on opposite sides defining the groove, one of the tongues being beveled on one side and the other bar having a beveled portion receiving said beveled tongue, and having a lengthwise rabbet receiving the other tongue of the first-named bar, and also having a lengthwise groove in the rabbet, both bars having alined kerfs flush with the groove in the second bar, and a flat plate with an intermediately located hook or bill offset from one face of the plate and slidably seated in the groove, with opposite ends of the plate located in the kerfs in the two bars, the joint being made rigid by securing the plate to both of said bars.

3. A corner joint for'window screen and other frames, comprising two bars abutting at right angles, with one bar having a groove extending lengthwise thereof and the respective bars having kerfs lying in one plane when the joint is assembled, and a plate having an intermediately located channel or bill offset from one face of the plate and disposed in the groove, with the plate having alined extensions located in the kerfs in both bars.

4:. In a corner joint for frames, a pair of frame members, the end of one member engaging one longitudinal edge of the other in interlocking relation, each of said members having a rabbeted portion, one of said members having a groove at the joint end in the rabbeted portion, and an anchor plate embedded in and secured to both of said members, the inner face of said anchor plate being flush with the rabbeted portions and said plate having a channel portion engag ing said groove to prevent racking of said frame.

5. In a frame construction,comprising frame members, rectangular in section, one of said frame members having a tongue across the width of the end on one side and a longitudinal kerf adjacent said tongue, the adjacent frame member having a rabbeted portion along one of its longitudinal edges receiving the tongue of the first-named member and having a groove at the bottom of the rabbeted portion, and having a lateral kerf out flush with said rabbet, and anchoring means secured in said kerfs, said anchoring means having a projection in said groove adapted to strengthen the joint.

6. In a corner joint for frames, a pair of frame members, the end of one member abutting the side of the other, said end having a transverse channel, the side of the adjacent member having a tongue to fit in said channeled end, kerfs cut in both of said members in the same plane as two of the contiguous sides of said tongue and channel, a groove in one of said contiguous sides, and an anchor plate secured in said kerfs, said anchor plate having a transverse channel interlocking with said groove to strengthen said joint.

'1'. In a corner oint for frames, two frame members having their ends rabbeted and disposed. in overlapping relation, an anchor plate comprising a relatively thin oblong plate having a transverse channel inter mediate its ends extending entirely across the same, said plate being inserted between. the overlapping parts of the frame members in concealed relation and said frame members having kerfs in which the ends of the plate are secured, and one frame member having a channel member across its rabbeted end to receive the channel portion of the plate.

In testimony, that I claim th foregoing as my own, I have hereto afiixed my sig nature.

RODNEY S. VAN FLEET. 

